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Ultimate the ^ ABO Study Guide Version 7/2016 Ultimate The ^ ABO Study Guide Version 7/2016 "Opticianworks.com was truly a game changer for me! The basic (free) ABO Guide was good for helping me pass the ABO, but then I discovered the paid portion. It was there that I found endless tools, in the form of videos, charts, explanations, formulas, and links, that opened my eyes to all that was possible, both in passing my necessary tests, and in becoming a true professional. Thank you for creating and maintaining such a professional and detailed resource, and at such an affordable price, too! I am a fan of quality overall, wherever I find it. So many things are shoddily done these days, but the quality of your site truly shows. Heck, I happen to live near John and he even had me over for a 1:1 practice session! Where else are you going to find that kind of customer service?” Pam DiPrima 7/2016 __________________________________________________________ “OpticianWorks is by far the best thing I've spent so few dollars on in the past few months. For $10 a month, I have had my expectations exceeded and so much more than the study guides for the ABO/licensing exams. My daily questions get answered immediately, and at my request, study guides and "problems" get emailed to me for practice. This is my career I'm talking about, and without being properly prepared for my exams, to obtain certifications and licenses, I'm just another minimum wage statistic. What do you spend $10 on, on a DAILY basis? Lunch with a coworker? A movie without the popcorn and drink? What if you could spend only $10 a MONTH and get yourself fully prepared as an optician? You can! Worth it. I'm surprised I haven't gotten an invoice yet for the one-on- one emails I send multiple times a week! If you are serious about being the best optician you can be, OpticianWorks is the way to go.” Laura Americo 7/2016 2 The American Board of Opticianry (ABO) does not endorse any test preparation program or study materials. This document is completely free to print, use, share, and distribute. To be sure you have the latest version visit us at: www.OpticianWorks.com. The ABO is the minimum required knowledge to start a career as an optician. The ABO does NOT prepare you for the actual work you will be doing as an optician. The ABO does NOT cover: sales, specialty eyewear, insurance, business management, contact lenses, low-vision, finishing, lab relations, repairs or order processing. OpticianWorks.com does! ____________________________________________ How to Pass the ABO: The ABO is based on concepts. To pass the ABO you need grasp the concepts. The concepts are quite basic and you will pass the exam if you apply: Memorization: Good old fashioned memorization. Study until you have the concepts memorized. Use flash-cards, quiz sessions and study. Practice: Work the examples given five, ten, fifteen times or until you can see the patterns. Visualization: Close your eyes and picture the concepts in your mind. Picture them in practice and in three-dimensions. Practice it! Drawing: You are given scrap paper for a reason. USE IT! If you do not draw the prism questions out, you will not get the questions right. The ABO is a multiple choice exam. If you take your time you will be able to determine the correct answer every time by process of elimination. 3 Chapter 1: Ocular Anatomy ........................................................................................................ 6 The Structure of the Eye .................................................................................................................. 6 The Oculomotor Muscles of the Eye .............................................................................................. 11 Refractive Errors ............................................................................................................................ 12 Chapter 2: Basic Optical Principles .......................................................................................... 18 Light and the Electromagnetic Spectrum ...................................................................................... 18 Refraction ...................................................................................................................................... 18 The Index of Refraction “n” ........................................................................................................... 19 Diopter/Prism Diopter ................................................................................................................... 19 Lenses as Prisms ............................................................................................................................ 20 Lens Power and Lens Power Formulas .......................................................................................... 22 Chapter 3: Lens Form .............................................................................................................. 23 Sphere ........................................................................................................................................... 24 Cylinder ......................................................................................................................................... 24 Axis ................................................................................................................................................ 25 Aspheric Lens Design ..................................................................................................................... 26 Flat Transposition ......................................................................................................................... 26 The Optical Cross ........................................................................................................................... 27 Prism ............................................................................................................................................. 29 Optical Center Verses Major Reference Point ............................................................................... 30 Working with Prism Prentice’s Formula ........................................................................................ 30 Compounding Prism - Canceling Prism ......................................................................................... 30 Prism Power & Meridian ............................................................................................................... 31 Chapter 4: Lens Options .......................................................................................................... 34 Lens Materials ............................................................................................................................... 34 Lens Material & Thickness ............................................................................................................ 36 AR or Non-Glare Coatings ............................................................................................................. 36 Photochromics: (Changeable Tint Lenses) .................................................................................... 37 Polarization ................................................................................................................................... 37 Tinting ........................................................................................................................................... 37 Multifocals .................................................................................................................................... 38 Progressives .................................................................................................................................. 40 Slab Off ......................................................................................................................................... 41 Chapter 5: The Written Prescription ....................................................................................... 42 Primary prescription information explained. ................................................................................ 42 Conversion of a prescription with an add power provided to single vision readers. ..................... 44 Chapter 6: Frames ................................................................................................................... 46 How Frames Are Measured ........................................................................................................... 46 The Parts of an Eyeglass Frame .................................................................................................... 47 Frame Materials ............................................................................................................................ 50 Verifying frame and lens parameters and other physical characteristics. .................................... 52 Standard Alignment ...................................................................................................................... 56 Measuring ..................................................................................................................................... 60 Applying Product Knowledge ........................................................................................................ 64 Dispensing a complete pair of glasses. ......................................................................................... 66 4 Trouble shooting. .........................................................................................................................
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